You may exclude variables in the Load Options when first loading a dataset, but if you did not do that there are a couple of options. In the Statistics tab (the first tab that loads when you load an analysis) you can right-click on a variable and choose to ‘Hide Selected Columns’. This will remove the variable from reference in every analysis window.
If you prefer to be able to visualize the variable, among other options, but just exclude it from the model, in the Model window in the Automine tab you can right-click on the variable(s) and choose the option ‘Exclude Variables and its Transforms from Modeling’.
